DREER’S VEGETABLES UNDER GLASS. * 35 
glass window, on the south side of the house, is frequently 
hinged on the lower edge, and made to swing inward. 
The first cost of the modern forcing house is not as great 
as formerly, though it is still considerable. Its use is fully 
warranted for commercial operations, and it is likely to 
become increasingly common in all parts of the country. 
Winter gardening throughout the United States must  ~ 
increase under to-day’s conditions. The under-glass crops 
are all ‘‘ money crops.”’ 
